Methods of denitrating exhaust gases
US6080376A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1997 |
| Grant date | Jun 27, 2000 |
| Priority date | — |
| Expiry date | Dec 10, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J29/061
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of denitrating an exhaust gas by means of removing nitrogen oxides catalytically using ammonia as a reducing agent while introducing an exhaust gas containing the nitrogen oxides into a reaction vessel packed with a catalyst, comprising: PA1 providing a denitration catalyst layer in the upstream of the gas flow, an ammonia decomposition catalyst layer capable of decomposing oxidatively ammonia into nitrogen and nitrogen oxides in the downstream and a second denitration catalyst layer or a denitration catalyst layer capable of decomposing ammonia in the further downstream; and, PA1 adding ammonia in an amount not less than the reaction equivalence for the nitrogen oxides in the exhaust gas to the inlet of the first denitration catalyst layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.